Privacy & Copyright

We try to collect some pictures or diagrams from various sources. The image here may be the property of the author and I do not claim that all images are ours. Intellectual property belongs to the author and we try to provide a link to the image where we got it. All forms of use are the sole responsibility of the user, we only try to provide information according to the topics we provide. For images deemed to violate property rights and privacy, please contact us here.